EP2019753B1 - Assemblies in the printing unit of a rotary press - Google Patents

Abstract

The assembly has a plate cylinder (02), three ink form rollers (03,04, 06), two vibrator rollers (12,13) and an ink separator roller (11). Both vibrator rollers are applied directly to the ink separator roller and the ink form rollers is applied to both the vibrator rollers and plate cylinder. The plate cylinder is covered with multiple forms and the upper ink form roller is located in such manner that a horizontal tangent to the circumference of ink form roller lies at a vertical distance of 50 millimeter from a horizontal tangent to the circumference of plate cylinder.

Description

The invention relates to an arrangement in a printing unit of a rotary printing press according to the preamble of claim 1.

By the DE 44 39 144 A1 / C2 is an inking unit of a rotary printing machine with a printing ink from a ink reservoir receiving ink fountain roller and a plurality of ink on a printing unit cylinder inking rollers known, wherein a color coming from the ink fountain ink stream is provided in a main stream and in a sidestream dividing paint flow separation roller, wherein in the main stream and in the Side flow is arranged in each case one of the ink jet separating roller on at least one of the inking rollers ink transfer roller friction. The roller between the ink fountain roller and the ink flow separating roller comprises four rollers arranged in series and is thus relatively long, so that a relatively thick ink layer is to be applied to the ink roller in the roller following a relatively thick ink layer when the inking rollers to apply a very specific amount of ink on the printing cylinder , After each nip between two adjacent ink transfer rollers, the ink layer thickness on the nip downstream roller is indeed lower, but the respective ink layer thickness is necessarily relatively high at least on the first of the four near the ink reservoir rollers due to the many cleavages to the printing cylinder, which is just In a high-speed rotary printing machine leads to increased color mist.

By the WO 2004/024451 A1 is an inking unit of a rotary printing machine with a printing ink from a ink reservoir receiving ink fountain roller and a plurality of ink on a printing unit cylinder-applying inking rollers known, with a coming from the ink fountain ink stream in a main stream and in a By-pass dividing ink flow separating roller is provided, wherein in the main stream and in the side stream each one of the ink flow separation roller on at least one of the inking rollers ink transfer roller is arranged, wherein the ink to be fed into the compactor ink is applied with a chamber doctor blade directly to the ink flow separation roller. The ink flow separation roller is designed as an anilox roller. Such a short inking unit has no means for zone-wise color quantity metering and is only suitable for use in conjunction with a damp-proof dry offset printing method.

By the DE 10 2004 004 665 A1 is known to equip rollers of an inking and / or dampening each with a device with a remotely operable radial stroke of the respective roller z. B. for setting their contact pressure against an adjacent body of revolution executable.

By the DE 10 2004 037 889 A1 a device for supporting a cylinder of a printing unit with a movable along a travel in linear bearings, a rotary bearing bearing block is known, wherein the bearing is designed as a bearing unit in the manner of a mountable assembly as a whole, which comprises both the bearing in addition to the rotation bearing bearing elements, which allow the relative movement of the bearing block.

By the DE 27 23 582 B a paint roller with a formed as a sleeve shell part of a microporous elastomeric material is known, wherein in the z. B. consisting of foam rubber casing part a plurality of cavities, wherein the cavities have substantially different sizes, which are within a predetermined size range, which is intended with this ink roller, in particular at a higher peripheral speed of at least 305 m / min. to avoid throwing away color spray mist.

By the DE 30 04 295 A1 is known a hard-surface fluid roll, wherein on the outer surface of the cylindrical core a hard metal coating z. B. chrome z. B. is applied with a thickness of up to 0.5 mm, wherein in this coating by etching a random pattern of interconnected columns and intermediate, separate islands is formed, wherein the interconnected columns occupy up to 30% of the surface of the fluid roller, wherein the column has a depth z. B. up to 0.075 mm, said fluid roller cooperates for the transport of the fluid with another roller, said further roller having a soft lateral surface, wherein both rollers are employed against each other.

By the US 45 37 127 A is an ink roller formed from steel whose outer surface is structured by engraving preferably with intersecting lines in a cell pattern, surface hardened by nitriding and then subjected to an oxidation process, wherein the oxidation process on the outer surface of the roller an outer mainly of Fe ₃ O ₄ existing layer is formed.

By the DE 10 2004 040 150 A1 a printing unit is known having at least one ink fountain roller inking unit, wherein in the inking unit between a printing ink from a ink fountain ink fountain roller and Farbstromtrennwalze only a single roller is arranged, said roller is formed as a film roll, wherein the film roller has a lateral surface having a structure having.

By the DE 69 10 823 U a film roll for inking machines of rotary printing machines is known, wherein the film roll has a surface provided with a thin hard rubber layer, wherein the hard rubber layer has a hardness of 80 to 85 ° Shore.

By the DE 100 28 478 A1 is a method for producing a preferably made of steel anilox roller is provided, which is provided on its surface with wells, wherein the wells are preferably produced by shot peening. A disadvantage of this anilox roller is that a jacket surface made of steel, especially in a wet offset printing process, causes a disturbance in the color transport after a short period of operation, since such a jacket surface tends to run quickly free of color.

The invention has for its object to provide an arrangement in a printing unit of a rotary printing machine, which is particularly suitable for use in a newspaper printing press, and has a compact, fast-reacting in the ink metering inking.

The object is achieved by the features of claim 1.

The advantages that can be achieved with the invention are in particular that the proposed arrangements also contribute to the production of a printed product with a high print quality under the conditions of use in a high-speed rotary printing press. They also allow a short time executable change of several arranged on the forme cylinder printing forms. If the arrangements are completed to an employee employed to the forme inking unit, this inking unit is wear-resistant even at a transport speed of a printed in this rotary printing material of more than 10 m / s and this inking is also less prone to color fogging. When using a film roll this has a lateral surface with a hardness of at least 60 Shore D, preferably over 70 Shore D, in particular in the range of 80 to 90 Shore D, so they under the conditions of use in a high-speed rotary printing machine with a transport speed of the printing substrate of more than 10 m / s is less wear than a conventional film roll, z. B. a film roll having a hard rubber layer having a lateral surface. Because the aforementioned high values for the hardness of the lateral surface of a film roll can not be achieved by rubber materials become. In order to form a wear-resistant lateral surface for the aforementioned conditions of use, it is advantageous to select a polyamide or a polyacrylate or copper as the material for the lateral surface, since these materials are distinguished by high abrasion resistance and also aging resistance, while at the same time offering a color-friendliness have very good ink acceptance and ink delivery properties. Particularly advantageous is the use of Rilsan, ie a polyamide of 11-aminoundecanoic acid (Rilsan B, PA 11) or ω-laurolactam (Rilsan A, PA 12), said polyamide materials having a hardness of at least 60 Shore D, preferably about 70 Shore D, where particularly high values for the hardness are achieved by the fact that the polyamide material in question is reinforced by glass fibers. It is noteworthy that in the inking unit between the ink fountain roller and the Farbstromtrennwalze there is a very large difference in the respective peripheral speeds, so that the lateral surface of the arranged between the ink fountain roller and the Farbstromtrennwalze film roller is exposed to high mechanical and possibly thermal stress.

Forming the circumferential surface of a film roll having a stochastic structure is advantageous because a film roll having a shell surface having a stochastic structure has a very favorable ink conveying performance, which contributes to the production of a printed product having a high print quality. In addition, the proposed way of introducing the stochastic structure into the surface of the film roll is very advantageous, because shot peening is a very cost-effective processing method.

Further, it is advantageous that the Farbduktor due to the shortness of the ink to the printing cylinder transporting compactor, ie record the lower number of Farbspaltstellen, only a comparatively thin ink layer from the ink reservoir and must apply to the ink ductor downstream roller to the amount required on the printing cylinder To provide printing ink. Accordingly, are the color layers on the rollers mainly causing a color mist, ie in particular relatively thin on the film roller, which is why the proposed inking unit also tends to fog when used in a high-speed rotary printing machine with a transport speed of printed in this rotary printing material of more than 10 m / s ,

Accordingly, the features proposed with regard to the film roll lead to a film roll which, under the conditions of use in a high-speed rotary printing press, has a long service life and very good ink transfer behavior together with a low color fogging and is also inexpensive to produce.

Another advantage is that the proposed arrangements due to the short compactor in an ongoing production process quickly to a z. B. at one or more color zones changed setting of the ink dosage reacts, so that a waste produced to stable provision of the new amount of ink waste can be reduced.

Moreover, there is the advantage that an inking unit formed from the proposed arrangements only provides a relatively small ink volume in its comparatively short compactor, as a result of which the washing times associated with cleaning the inking unit can be kept short. Short washing times are counteracted by the demand, in particular for newspaper customers, for short set-up times, because the washing times are part of the set-up times.

A front-heavy inking unit with several, z. B. at least three inking rollers, as proposed here, generated on the printing cylinder to which the inking rollers are employed, or on the at least one printing plate, which is arranged on this printing cylinder, a uniform application of paint, which for the Quality of the printed product, which is produced in the printing press having this inking unit, is an essential criterion. Conventional newspaper printing machines have so far usually only two inking rollers. Three inking rollers, however, better even out the application of paint than just two inking rollers. Also, they better even out a stencil forming on the inking rollers in their respective color film, so that an inking unit having three or more inking rollers is less prone to stenciling. Under stenciling is understood to be a shadow-like repeating in the printing direction of the printing cylinder, undesirable image of a front of the printed image part. The image shows a higher or lower coloration compared to the environment. Stenciling is influenced by the color distribution in the inking unit, in particular by the color distribution on the inking rollers. If a previously impressed color profile is not sufficiently degraded, ie evened, by color cleavage due to the image on the printing plate before the next inking, ie revolution of the inking rollers, a partial transfer of the already printed image section to another of the image part to be printed on the printing substrate.

In addition, an improvement in the quality of the printed product produced in connection with this inking unit is possible by a radial-lift bearing at least the film roller and / or the ink flow separation roller and / or the inking rollers of the inking, because the force exerted by the respective roller contact pressure adjustable and nachführbar as needed is, with this setting the transport of ink controllable and thus optimized.

An embodiment of the invention is illustrated in the drawings and will be described in more detail below.

Fig. 1

einen Teil eines Druckwerks mit einem Farbwerk und einem Feuchtwerk;

Fig. 2

den in der Fig. 1 dargestellten Teil des Druckwerks mit einer Lagerung der Druckwerkszylinder und mit jeweils einer Verstelleinrichtung an diversen Walzen, wobei die Walzenzüge jeweils geschlossen sind;

Fig. 3

den in der Fig. 1 dargestellten Teil des Druckwerks mit einer Lagerung der Druckwerkszylinder und mit jeweils einer Verstelleinrichtung an diversen Walzen, wobei die Walzenzüge jeweils durch einen Spalt unterbrochen sind;

Fig. 4

eine Schnittdarstellung einer Lagereinheit eines Druckwerkszylinders;

Fig. 5

einen Druckturm einer Druckmaschine mit mehreren von den in den Fig. 1 bis 3 dargestellten Anordnungen in einer ersten Betriebsstellung;

Fig. 6

den in der Fig. 5 dargestellten Druckturm in einer zweiten Betriebsstellung;

Fig. 7

den in der Fig. 5 dargestellten Druckturm mit Druckwerken jeweils ohne ein Feuchtwerk zur Ausführung eines Trockenoffsetverfahrens;

Fig. 8

den in der Fig. 5 dargestellten Druckturm mit jeweils einem an den jeweiligen Formzylindern angestellten Druckformmagazin.

Show it:

Fig. 1

a part of a printing unit with an inking unit and a dampening unit;

Fig. 2

in the Fig. 1 shown part of the printing unit with a storage of the printing cylinder and each with an adjustment to various rollers, the compactors are each closed;

Fig. 3

in the Fig. 1 shown part of the printing unit with a storage of the printing cylinder and each with an adjustment to various rollers, the rollers are each interrupted by a gap;

Fig. 4

a sectional view of a bearing unit of a printing cylinder;

Fig. 5

a printing tower of a printing press with several of the in the Fig. 1 to 3 shown arrangements in a first operating position;

Fig. 6

in the Fig. 5 illustrated printing tower in a second operating position;

Fig. 7

in the Fig. 5 illustrated printing tower with printing units each without a dampening unit for performing a dry offset process;

Fig. 8

in the Fig. 5 illustrated printing tower, each with a hired at the respective cylinders form printing forme magazine.

In the Fig. 1 an example of a part of a printing unit of a rotary printing machine is shown. In the illustrated example, the rotary press operates in a wet offset printing process. Their use is intended especially in newspaper printing.

The printing unit has as a printing cylinder 01; 02 at least one transfer cylinder 01 and a cooperating with this transfer cylinder 01 form cylinder 02. The transfer cylinder 01 generates with each its revolutions on a substrate, not shown, preferably on a material web, in particular on a paper web, at least one printed image. In the in the Fig. 1 shown operating case of the printing unit are employed at the forme cylinder 02 at least one inking unit and a dampening unit.

The inking unit has a plurality, preferably at least three inking rollers 03; 04; 06, which are employed in a current production process of the rotary printing machine to the forme cylinder 02. Between a printing ink from a ink reservoir 07 receiving ink fountain roller 08 and the ink on the forme cylinder 02 applying inking rollers 03; 04; 06 are several rollers 09; 11; 12; 13 arranged. The roller 09 next to the ink fountain roller 08 in the transporting direction of the ink is formed as a film roller 09. Then, in the transport direction of the ink after the film roller 09, a roller 11 formed as a ink flow separating roller 11 is provided which divides a paint stream A coming from the ink fountain roller 08 into a main stream B and a sub-stream C. In the Fig. 1 is the leading to the forme cylinder 02 course of the main flow B by a solid line and also leading to the forme cylinder 02 course of the secondary flow C indicated by a dashed line. In the main stream B and the secondary stream C is one of the ink flow separation roller 11 on at least one of the inking rollers 03; 04; 06 ink transferring roller 12; 13, said roller 12; 13 each as a rubbing roller 12; 13 is formed. The two friction rollers 12; 13 perform a running in their respective axial direction traverse stroke, the traverse stroke of a friction roller 12 z. B. may be coupled by a lever arrangement with the traverse stroke of the other friction roller 13. In an alternative embodiment, the traverse stroke of the respective friction roller 12; 13 generated by independent drives. In both drive variants, the two traversing strokes can be designed in opposite directions. The traverse stroke dei respective friction roller 12; 13 can z. B. be generated by means of a gear from the rotational movement. Both in the main stream B and in the secondary stream C ink taken from the ink reservoir 07 is in each case lined up by means of a five-row Rollers 08; 09; 11; 12; 13; 03; 04; 06 having roller train applied to the forme cylinder 02, wherein the ink fountain roller 08, the film roller 09, the Farbstromtrennwalze 11, one of the friction rollers 12; 13 and one of the inking rollers 03; 04; 06 are each part of each of the forme cylinder 02 leading roller train. Accordingly, only a single roller 09 is arranged in the roller train between the ink fountain roller 08 and the ink flow separating roller 11, this roller 09 being designed as a film roller 09, wherein the film roller 09 has a special feature with regard to its lateral surface, which will be discussed later.

The main stream B is that part of the color ink coming from the ink fountain roller 08 A, which is removed in the direction of rotation of the ink flow separation roller 11 of this ink flow separation roller 11 and forwarded as the first arranged in this main flow B friction roller 12 in the direction of the forme cylinder 02. The part of coming from the ink duct 08 color flow A, which is downstream of the main stream B in the direction of rotation of the ink flow separation roller 11 removed from this ink flow separating roller 11 and forwarded in the direction of the forme cylinder 02, is referred to as the secondary stream C taken from the ink reservoir 07 ink. The secondary flow C can turn into further partial streams D; E be divided if at the arranged in the secondary flow C friction roller 13 more, in particular two of the inking rollers 03; 04; 06 are employed. Since the main stream B of coming from the ink duct 08 color flow A the forme cylinder 02 in the direction of rotation first, ie at least spatially before the side stream C and its partial streams D; E reached, such an inking unit is referred to as front-heavy. The in the flow C of color coming from the ink duct 08 color flow A ink is transported z. B. applied to the pre-colored by the main stream B forme cylinder 02. Also found by the to the secondary flow C and its partial flows D; E belonging inking rollers 04; 06, a smoothing of the main stream B on the forme cylinder 02 applied portion of the ink instead. Such an inking unit produces a uniform application of ink on the forme cylinder 02. A Inking unit, whose main flow B of coming from the ink duct 08 color flow A the forme cylinder 02 in the direction of rotation after the applied on the forme cylinder 02 side stream C and its partial streams D; E is applied is called Hinterlastig.

The ink reservoir 07, from which the ink fountain roller 08 removes the ink to be transported to the forme cylinder 02 is, for. B. formed as a paint box 07 or as a paint tray 07, wherein strung together on the ink fountain 07 or on the paint tray 07 in the axial direction of the ink duct 08 more, z. B. thirty to sixty paint knives (not shown) are provided, which are each preferably remotely adjustable with an adjusting means, not shown in their respective employment of the ink fountain roller 08 and actually employed, whereby a zonewise metering of the ink ductor 08 recorded ink is possible. The adjustment made with the setting of the respective color meter dosage of the amount of color manifests itself in a proportional to this setting layer thickness of the ink in the relevant zone on the lateral surface of the Farbduktors 08. The inking unit is therefore formed in the preferred embodiment as a zone inking unit.

The rollers 03; 04; 06; 08; 09; 11; 12; 13 of the inking unit have in their respective axial direction a length z. B. in the range of 500 mm to 2,600 mm, in particular in the range of 1,400 mm to 2,400 mm. Your outer diameter is z. B. in the range between 50 mm and 300 mm, preferably between 80 mm and 250 mm.

The ink flow separation roller 11 has a lateral surface preferably made of an elastic material, for. B. made of a rubber. The elastomer material of the ink flow separation roller 11 may have a layer thickness z. B. in the range between 1 mm and 20 mm, preferably between 5 mm and 15 mm. The lateral surface of the paint flow separation roller 11 is preferably formed with a hardness in the range between 40 and 80 Shore A, in particular in the range between 50 and 60 Shore A, this measure of the hardness is defined according to DIN 53505. The higher the value of this hardness specification, the greater the hardness of the material used in this case for the lateral surface of the paint flow separation roller 11.

The film roller 09 has a special feature of its lateral surface on a lateral surface with a stochastic structure, d. H. a lateral surface with an irregular distribution of elements structuring this surface, which i. d. R. have a non-uniform shape and also no particular preferred direction. The lateral surface of the film roller 09 is preferably made of a plastic, preferably of a polyacrylate or polyamide, in particular of Rilsan, or in an alternative embodiment of copper. The lateral surface of the film roller 09 is comparatively hard and has a hardness of at least 60 Shore D, preferably over 70 Shore D, in particular in the range of 80 to 90 Shore D, whereby this measure of the hardness is defined according to DIN 53505. The stochastic structure is introduced in the preferred embodiment of the film roller 09 in their originally smooth and homogeneously formed lateral surface by shot peening, which is a particularly simple and therefore cost-effective production of advantageous for the transport of printing ink surface of this film roller 09. It should be noted that there is no linear correlation between the Shore A and Shore D hardness test methods. An appendix to DIN 53505 can be taken from a purely technical point of view that a hardness of 80 Shore A corresponds to approx. 30 Shore D. A hardness specification of at least 60 Shore D, preferably over 70 Shore D, in particular from 80 to 90 Shore D, therefore denotes a comparatively very hard surface.

Also, the lateral surface of the friction rollers 12; 13 may each be made of plastic, preferably of a polyamide, in particular of Rilsan. The lateral surface of the friction rollers 12; 13 is smooth and without a stochastic structure. The inking rollers 03; 04; 06 each preferably have a lateral surface made of an elastomeric material, preferably made of a rubber, which according to DIN 53505 defined hardness of these lateral surfaces is preferably in the range between 35 and 60 Shore A. The lateral surface of the ink ductor 08, which is preferably immersed in printing ink, may be a steel or a ceramic layer applied to a material forming the core of the ink ductor 08.

The stochastic structure of the lateral surface of the film roller 09 is preferably formed by embedded in this lateral surface cavities and depressions, which each form structural elements, wherein the cavities and depressions in the radial direction of the film roller 09 has a depth in the range of z. B. 50 microns and 400 microns may be, this depth is formed unevenly with respect to the distributed on the lateral surface of the film roller 09 structural elements. The film roller 09 as a rotation body actually limiting cylindrical surface has a roughness with an absolute surface roughness R _t z. B. in the range of 100 microns to 120 microns and with an average roughness R _z z. B. in the range of 60 microns to 80 microns, these values z. B. with a perthometer, ie a stylus device, preferably in accordance with relevant standards, eg. B. DIN EN ISO 4287, can be determined. A calculated according to DIN 4776 from an Abbott curve smallest material content Mr1 (corresponding to a supporting portion of the tips) of the lateral surface of the film roller 09 is z. In the range between 7% and 13%, preferably between 9% and 11%. A according to DIN 4776 from the same Abbott curve determined largest material content Mr2 (corresponding to a supporting portion of the grooves) of the lateral surface of the film roller 09 is z. In the range between 80% and 95%, preferably between 85% and 90%.

Each of the open on the lateral surface of the film roller 09 cavities and / or depressions forms with respect to the cylindrical reference surface, ie with respect to the closed and smooth-walled imaginary cylindrical surface, a blank, wherein the empty space the opening cross section of the respective cavity or the respective recess in the Level of the reference surface corresponds. The sum of the empty areas of all existing on the lateral surface of the film roller 09 cavities and / or Recesses forms a void fraction relative to the closed cylindrical surface, the void fraction being at most 35% of this cylindrical surface and preferably between 20% and 30%. Depending on the size of their respective empty area and their respective depth, the cavities and / or depressions of the film roller 09 form a void volume, the void volume of all cavities and / or depressions present per m ^{2 of} imaginary cylindrical surface being at least 50,000 mm ³ , preferably at least 100,000 mm ³ , in particular at least 150,000 mm ³ .

The arranged on the lateral surface of the film roller 09 cavities and / or depressions thus structure with their respective Leerflächenanteil and with their respective void volume, the lateral surface of the film roller 09 and form a relief there, said relief z. B. is tunable to the rheological behavior of the ink to be transported, in particular the viscosity and / or the tack of the ink to be transported, so that the operations of filling and emptying of the cavities and / or depressions with the ink to be transported and arresting the transporting ink are optimized during their respective transport from the ink fountain roller 08 to the ink flow separation roller 11 in response to a provided for this film roller 09 on its lateral surface rotational speed, wherein a rotational speed of the film roller 09 conditional transport speed of the printed in this rotary printing press substrate z. B. may be in the range up to 20 m / s, with such a rotary printing machine is used in particular in newspaper printing. The advantageous effect of the introduced in the film roller 09 cavities and / or depressions comes especially at a higher transport speed of printed in this rotary printing material to advantage, eg. B. at a transport speed of at least 10 m / s, in particular in the range between 10 m / s and 15 m / s. The production speed of the printing press can also by the speed of their printing cylinder 01; 02 be given, this speed of the z. B. formed as a double circumferential cylinder rotating printing cylinder 01; 02 z. B. is more than 40,000 revolutions per hour. A double circumferential cylinder has along its circumference two preferably equally long section lengths, each section length z. B. corresponds to a height of a newspaper page to be printed. Both cooperating printing cylinder 01; 02 preferably have a magnitude equal in magnitude.

In order to equalize the ink layer thickness on the ink flow separation roller 11 and remove ink from the ink fountain roller 08 excess ink from the lateral surface of the ink flow separation roller 11, at the ink flow separation roller 11, a further formed as a doctor roller 14 roller 14 may be employed or at least be employable, wherein the doctor roller 14th a squeegee 16 is employed. The squeegee roller 14 is set to the ink flow separation roller 11 in the direction of rotation after the branch of the secondary flow C. The scraped from the doctor roller 14 with the doctor blade 16 excess ink is z. B. returned to the ink reservoir 07, which in the Fig. 1 is indicated by the doctor blade 14 in the direction of rotation below the doctor blade 16 dripping ink.

Moreover, a bridge roller 17 may be provided, wherein the bridge roller 17 at the same time to one of the inking rollers 03 and to a z. B. as a dampening roller 18 formed roller 18 of an adjustable to the forme cylinder 02 dampening unit is employed or at least employable. The bridge roller 17 can preferably be adjusted to an inking roller 03 arranged in the main flow B. It smoothes again leading to the forme cylinder 02 main stream B coming from the ink fountain roller 08 color flow A. The dampening unit is preferably as a dampening contactless applying moisturizing, z. B. formed as a spray dampening unit, so that it has a spray bar 19, wherein preferably a plurality of arranged in the spray bar 19 spray nozzles the dampening solution to a z. B. sprayed as a dampening drive roller 21 roller 21 of the dampening unit. That on the Dampening drive roller 21 sprayed dampening solution is from another z. B. as a smoothing roll 22 formed roller 22 of the dampening unit on the dampening roller 18 and transferred from there to the forme cylinder 02. With the bridge roller 17 leading to the forme 02 main stream B of coming from the ink duct 08 color flow A to the dampening roller 18 of the dampening unit is extended, which has the advantage that the transported over the main stream B ink already provided in the dampening unit with that of this dampening unit Moistening agent comes into contact and is applied together with the dampening solution on forme cylinder 02. In this operating case, only one partial stream F leads from the inking roller 03 arranged in the main stream B, directly to the forme cylinder 02, from the ink transported in the main stream B.

The lateral surface of the dampening applicator roll 18 is preferably formed from an elastomeric material, preferably made of a rubber, wherein the defined according to DIN 53505 hardness of this lateral surface is preferably in the range between 25 and 30 Shore A and thus is relatively soft. Provided that the lateral surface of the smoothing roller 22 is formed of chromium, the lateral surface of the dampening drive roller 21 is formed of a relatively soft elastomeric material, preferably of a rubber, wherein the defined according to DIN 53505 hardness of this lateral surface preferably in the range between 25 and 30 Shore A is. In contrast, if the lateral surface of the smoothing roller 22 is also formed of an elastomeric material, then the lateral surface of the smoothing roller 22 and the dampening roller 21 are preferably made of the same elastomeric material, for. B. made of a rubber, wherein the defined according to DIN 53505 hardness of these lateral surfaces is preferably in the range between 40 and 60 Shore A. Thus, de outer surface of the dampening drive roller 21 is harder in the second alternative than in the first alternative. Whether the first or the second alternative is used depends on how the rollers 18; 21; 22 of the dampening unit are driven. In the case that the smoothing roller 22 a separate drive 57, z. B. an electric motor 57, which in the Fig. 1 is shown by dashed lines due to its only optional presence, is its lateral surface formed of chrome and the lateral surface of the driven with this smoothing roller 22 dampening drive roller 21 is comparatively soft, as described above. When the rollers 18; 21; 22 of the dampening unit are all friction-driven, the dampening unit thus has no own drive 57, the aforementioned second alternative is the preferred embodiment. In the case of friction-driven dampening unit, the bridge roller 17 is an independent drive 56, z. Example, an electric motor 56, wherein the rotating bridge roller 17 exerts a torque on the cooperating with their dampening roller 18, which in turn by friction, the smoothing roller 22, which then ultimately dampening roller 21 drives. The smoothing roller 22 is preferably formed iridescent. The traverse stroke extending in the axial direction of this smoothing roller 22 can be generated by a separate drive or the traversing motion is coupled to the drive for the rotational movement of this smoothing roller 22, so that the traverse stroke is derived by a gear from the rotational movement.

In the Fig. 1 is the direction of rotation of the respective rollers 03; 04; 06; 08; 09; 11; 12; 13; 14 of the inking unit, the bridge roller 17, the rollers 18; 21; 22 of the dampening unit and the printing cylinder 01; 02 each indicated by an associated arrow. The printing cylinder 01; 02 are each with a drive 51; 52, z. B. an electric motor 51; 52 connected, these drives 51; 52 individually and independently controlled or regulated. In the inking unit is only one of the friction rollers 12; 13, namely either the friction roller 12 or the friction roller 13 by a drive 53; 54, z. B. an electric motor 53; 54 driven. In the Fig. 1 the preferred embodiment is shown in which the friction roller 12 is driven and the friction roller 13 has no motor. The other alternative should be indicated by the fact that for the friction roller 13, a drive 53 is shown only in dashed lines. The remaining rollers 03; 04; 06; 08; 09; 11; 14 of the inking unit are friction-driven and thus do not have their own motor drive. To change the middle To enable inking roller 04, the upper rubbing roller 13 is pivoted by a mechanical device in a direction that increases its axial distance a13 to the forme cylinder 02, so that the central inking roller 04 substantially by a vertically upward movement from the area between the forme cylinder 02 and the upper friction roller 13 can be removed.

The uppermost inking roller, 06 of the inking unit is arranged such that in its applied to the forme cylinder 02 operating state applied to the circumference of this inking roller 06 horizontal tangent T06 of a voltage applied to the circumference of the forme 02 horizontal tangent T02 at a vertical distance a06 of at least 50 mm. This vertical distance a06 forms, so to speak, an offset between the uppermost inking roller 06 and the forme cylinder 02. This arrangement results from an operating page of the printing from sufficient accessibility to the forme cylinder 02, especially since all other belonging to the inking rollers 03; 04; 08; 09; 11; 12; 13; 14 are arranged well below the applied to the circumference of the uppermost inking roller 06 horizontal tangent T06. The rollers 18; 21; 22 of the dampening unit are arranged substantially below the forme cylinder 02 and also do not limit the accessibility to the forme cylinder 02. The accessibility to the forme cylinder 02 must z. B. therefore be given in order to change on the lateral surface of the forme cylinder 02 in the shortest possible time one or more printing plates. A change of printing plates can be effected manually on the forme cylinder 02 by an operator operating the printing machine or automatically with the aid of a printing form magazine 58 preferably tangentially attached to the forme cylinder 02. Fig. 8 ).

Despite the comparatively small number of ink splits in the ink to the printing cylinder 02 transporting compactor produces the inking unit shown on the printing cylinder 02 a uniform application of paint, because there are more rollers provided where they are particularly needed for smoothing the paint application, namely in direct contact with the printing cylinder 02, where preferably three inking rollers 03; 04; 06 are provided. In particular, by the particular, namely stochastic structure of the lateral surface of the film roller 09 is achieved that the proposed inking hardly prone to stenciling. As a result, a printed product with a high print quality can be achieved with this inking unit even in newspaper printing, which takes into account the ever-increasing quality demands in newspaper printing. Even in a high-speed printing machine with a transport speed of the printing material of more than 10 m / s, preferably in the range between 10 m / s and 15 m / s, as is commonly used in newspaper printing, occurs due to the short roller train and the film roller 09 used the unwanted effect of color fog hardly on. The use of in the Fig. 1 described inking unit in a rotary printing machine, in particular in a newspaper printing press, is further explained in the following figures.

Fig. 2 and 3 show in a schematic sketch again in the Fig. 1 represented part of a printing unit, now in particular the storage of the printing cylinder 01; 02 and a respective adjustment of the inking rollers 03; 04; 06, the film roller 09, the ink flow separation roller 11, the dampening roller 18 and the dampening drive roller 21 are highlighted. In the Fig. 2 and 3 is different in each case Fig. 1 For the sake of simplicity, a representation of the doctor roller 14 and the bridge roller 17 has been dispensed with. The representations in the Fig. 2 and 3 differ in that Fig. 2 shows a first operating state with preferably each closed compactors, which means that z. B. the inking rollers 03; 04; 06 to the forme cylinder 02 and to one of the friction rollers 12; 13 are employed and that the dampening roller 18 is employed on the forme cylinder 02 and the smoothing roller 22. Fig. 3 shows, however, a second operating state with preferably each open, ie interrupted by a gap pulleys, which means that z. B. the inking rollers 03; 04; 06 and / or the dampening roller 18 are turned off at least from the forme cylinder 02.

All rollers 03; 04; 06; 08; 09; 11; 12; 13; 14 of the inking unit, the rollers 18; 21; 22 of the dampening unit, the bridge roller 17 and the printing cylinder 01; 02 are each arranged in spaced-apart, opposite side frames 47; 48 of the printing machine ( Fig. 5 rotatably mounted, wherein at least the inking rollers 03; 04; 06 and the dampening roller 18, but preferably also the film roller 09 and the ink flow separating roller 11 of the inking unit and the dampening roller 21 of the dampening unit are each arranged radiallyhubfähig. The radial stroke of these rollers 03; 04; 06; 09; 11; 18; 21 refers to the fact that the respective axis of these rollers 03; 04; 06; 09; 11; 18; 21 or at least one of the ends of these rollers 03; 04; 06; 09; 11; 18; 21 opposite one to the respective roller 03; 04; 06; 09; 11; 18; 21 belonging frame-fixed bearing point is eccentrically adjustable. The eccentric adjustment of each of the rollers 03; 04; 06; 09; 11; 18; 21 takes place in each case with the aid of preferably several, z. B. four each symmetrical and concentric about the respective axis of these rollers 03; 04; 06; 09; 11; 18; 21 arranged actuators 23, as exemplified in the Fig. 2 and 3 is shown, preferably even to the same roller 03; 04; 06; 09; 11; 18; 21 belonging actuators 23 individually and independently operated by a control unit and can be set to a specific travel, each actuated actuator 23 in each case with respect to the roller 03; 04; 06; 09; 11; 18; 21, to which it belongs, exerts a radial force, this force being the axis of this roller 03; 04; 06; 09; 11; 18; 21 moves radially or at least tries to move. If several at the same end of one of the rollers 03; 04; 06; 09; 11; 18; 21 arranged actuators 23 are actuated simultaneously, resulting from the axis of the respective roller 03; 04; 06; 09; 11; 18; 21 executed radial stroke of a vector sum of the respective radial force of actuated actuators 23. The actuators 23 are z. B. subjected to a pressure medium; Preferably, they are pneumatically operated. The actuators 23 are z. B. in each case one end of the respective roller 03; 04; 06; 09; 11; 18; 21 receiving roller lock arranged. The from the axis of the respective roller 03; 04; 06; 09; 11; 18; 21 executable Radialhub is preferably in the range of a few millimeters, z. B, it is up to 10 mm, which is sufficient to the respective roller 03; 04; 06; 09; 11; 18; 21 of at least one adjacent cylindrical rotary body, for. B. the forme cylinder 02, turn off. It is also envisaged that with the respective actuators 23 one of the respective roller 03; 04; 06; 09; 11; 18; 21 is applied against its at least one adjacent rotating body applied contact pressure, the degree of the set contact force by the controlled with this setting transport of ink or dampening influences the quality of the printed product generated in connection with this inking and / or dampening. The contact force is built up when already touch contact between the respective roller 03; 04; 06; 09; 11; 18; 21 and its adjacent rotary body, but still by the operation of one or more actuators 23, the at least one effective radial force is increased. By further or renewed actuation of one or more actuators 23, an existing contact force in its amount changed, for. B. also be reduced.

With the adjustment of the contact pressure, one of the rollers 03; 04; 06; 09; 11; 18; 21 exerts on its adjacent body of revolution, is also a width of a touching contact between this roller 03; 04; 06; 09; 11; 18; Set 21 and the adjacent rotary body forming roller strip, wherein the roller strip as a flattening on the lateral surface of the roller 03; 04; 06; 09; 11; 18; 21, on the lateral surface of the roller 03; 04; 06; 09; 11; 18; 21 cooperating cylindrical rotating body or on the lateral surface of both represents. The width of the roller strip is the chord forming by the flattening on the otherwise circular cross-section of the roller 03; 04; 06; 09; 11; 18; 21 or of the co-rotating body. The flattening is due to an elastically deformable lateral surface of the roller 03; 04; 06; 09; 11; 18; 21 or the cooperating with her rotary body possible. A roll strip is also referred to as a nip point. In the control unit controlling the actuators 23, values for their respective pressure level can be stored, to which the respective actuators 23 are set to for a particular roller 03; 04; 06; 09; 11; 18; 21 form a roller strip of a certain width to its adjacent body of revolution by the contact force resulting from the respective setting of the actuators 23.

The printing cylinder 01; 02, ie the transfer cylinder 01 and the forme cylinder 02 are, as shown in the Fig. 2 and 3 each mounted in a storage unit 24, preferably both ends of the respective printing cylinder 01; 02 are each stored in such a storage unit 24. The storage unit 24 allows the respective printing cylinder 01; 02 a linear travel S, this travel S is preferably aligned horizontally in a printing unit with substantially vertical guidance of the printing material. Details of the preferably used storage unit 24 are in the Fig. 4 shown.

The one on / Abstellmechanismus for the respective printing cylinder 01; 02 integrating storage unit 24 has in addition to a bearing 26, z. B. radial bearing 26, for example, a cylindrical roller bearing 26, for rotatably supporting the respective printing cylinder 01; 02 storage means 27; 28 for a radial movement of the respective printing cylinder 01; 02 - for pressure on or pressure off - on. For this purpose, the bearing unit 24 after its installation in or on a frame of the printing press frame-fixed, carrier-fixed bearing elements 27 and the movable against these bearing elements 28. The carrier-fixed and movable bearing elements 27; 28 are as cooperating linear elements 27; 28 and formed together with corresponding sliding surfaces or intermediate rolling elements in total as a linear bearing. The linear elements 27; 28 take in pairs a radial bearing 26 receiving, z. B. as a carriage 29 formed bearing block 29 between them. Bearing block 29 and the movable bearing elements 28 may also be made in one piece. The carrier-fixed bearing elements 27 are arranged on a support 31, which in total with one of the side frames 47; 48 ( Fig. 5 ) is connected. The carrier 31 is embodied, for example, as a carrier plate which, for example, at least on a drive side of the respective printing cylinder 01; 02 a recess for the passage of a shaft, z. B. a drive shaft of an in Fig. 4 Having not shown cylinder pin. Also, the frame wall on the drive side preferably has a recess or an opening for a drive shaft. On the opposite side of the drive side does not necessarily have a recess or a recess in the side frame 47; 48 ( Fig. 5 ) be provided.

Preferably, a length of the linear bearing, in particular at least a length of the frame-mounted in the mounted state bearing means 27 of the linear bearing, in the direction of the travel S considered smaller than a diameter of the associated printing cylinder 01; 02. The bearing block 29 preferably has only a single degree of freedom of movement in the direction of the travel S.

The storage unit 24, which is preferably designed as a unit which can be assembled as a whole, forms z. B. an optionally partially open housing from z. B. the carrier 31 and / or z. B. a frame (in Fig. 4 without reference z. B. the four bearing unit 24 to all four sides outwardly limiting plates). Within this housing or this frame are the radial bearing 26 bearing block 29, the linear guides 27; 28 and in an advantageous embodiment, for. B. a bearing block 29 linearly adjusting actuator 32 or more such actuators 32 housed. The frame-fixed bearing elements 72 are arranged substantially parallel to each other and define the direction of the travel S ( Fig. 4 ).

A pressure is applied by moving the bearing block 29 in the direction of the pressure point by means of a force F applied to the bearing block 29 by at least one actuator 32, in particular by at least one force-controlled actuator 32, by means of walchem for setting a defined or definable force F in Pressure-on direction on the bearing block 29 can be brought ( Fig. 4 ). The decisive for the color transfer and thus the print quality, inter alia, line force in the respective nip-site is therefore not by a travel, but by the balance of forces between the force F and between the printing cylinders 01; 02 resulting line force F _L and the resulting equilibrium defined. In a first, not specifically illustrated embodiment, the printing cylinder 01; 02 employed in pairs to each other by the bearing block 29 is acted upon by the corresponding set force F via the / the actuator (s) 32. Are several (eg three or four) adjacent to each other in a direct neighboring each pairwise cooperating printing cylinder 01; 02 executed without a possibility for fixing or limiting the travel S with a purely force-dependent adjustment mechanism, so it is indeed a. With respect to the required pressures (line forces) set system off and subsequently correct again, make a basic setting is due to the z. T. overlapping reactions difficult. For the basic setting of a system (with corresponding elevators on the printing cylinder 01, 02), it is therefore provided in an advantageous embodiment that at least the respective transfer cylinder 01 of the printing unit in a Anstelllage found by the equilibrium of forces can be fixed or at least wegbegrenzbar.

Particularly advantageous is an embodiment in which the bearing block 29 - even during operation of the printing press - at least in a direction away from the pressure point against a force, for. B. spring force, in particular a definable force, is movably mounted. This is - in contrast to the pure travel limit - on the one hand, a maximum line force in the interaction of the printing cylinder 01; 02 defined, and on the other hand allows yielding, for example, in a web break with subsequent winder on one of the printing cylinder 01; 02.

The bearing unit 24 has on its side facing a pressure point - at least during the adjustment process - a positionable stop 33, which limits the travel S to the pressure point out. The stop 33 is spatially variable in such a way that an effective stop as a stop surface 34, whose Reference numerals in the Fig. 4 is shown in an outbreak of the bearing block 29, along the travel S at least in one area is variable. It is thus provided by adjustable stop 33 in an advantageous embodiment, an adjusting device by means of which the position of a pressure near the end position of the bearing block 29 is adjustable. For Wegbegrenzung / adjustment serves z. B. a wedge drive described below. The placement of the stop 33 can in principle be done manually or via an actuating means 36 designed as an actuator 36.

Next is an advantageous embodiment in Fig. 4 not shown Hatte- or clamping means provided by means of which the stop 33 can be set in the desired position. Next is at least one resilient element 37, z. B. spring element 37, is provided, which applies a force F _R from the stop 33 in a direction away from there on the bearing block 29. Ie. the spring member 37 causes a pressure-Ab-places in the event that the bearing block 29 is not prevented in another way from the movement. A pressure-on points done by moving the bearing block 29 in the direction of the stop 33 by at least one actuator 32, in particular a force-controlled actuator 32, by means of which for employment of the respective printing cylinder 01; 02 optionally a defined or definable force F in print-on direction on the bearing block 29 can be brought. If this force F is greater than the restoring force F _{R of} the spring elements 37, so takes place with appropriate spatial training a hiring of the respective printing cylinder 01; 02 to the adjacent printing cylinder 01; 02 and / or a hiring of the bearing block 29 to the stop 33rd

Ideally, the applied force F, the restoring force F _R and the position of the stop 33 is selected such that no significant force .DELTA.F is transmitted between abutment 33 and the abutment surface of the bearing block 29 in the setting position ΔF | <0.1 * (F-F _R ), in particular | ΔF | <0.05 * (F-F _R ), ideally | ΔF | ≈ 0. In this case, the contact force between the printing cylinders 01; 02 essentially determined by the force applied by the actuator 32 F. The decisive for the color transfer and thus the print quality, inter alia, line force F _L in the respective nip point is therefore not primarily by a travel S, but defined at quasi-free stop 33 by the force F and the resulting balance. In principle, after finding the basic setting with the appropriate forces F, it would be conceivable to remove the stop 33 or a corresponding fixation effective only during the basic setting.

The actuator 32 can in principle be designed as an arbitrary, a defined force F applying actuator 32. Advantageously, the actuator 32 is designed as actuatable by a pressure medium adjusting means 32, in particular as a movable piston 32 by a fluid. Advantageous in terms of possible tilting is the arrangement of several, here two, such actuators 32. As fluid is preferably because of their incompressibility a liquid, eg. As an oil or water, used.

For actuation of the actuators 32 designed here as hydraulic pistons 32, a controllable valve 38 is provided in the bearing unit 24. This is performed, for example, electronically controlled and provides a hydraulic piston in a first position without pressure or at least to a lower pressure level, while in another position a force F conditional pressure P is applied. In addition, a non-designated leakage line is provided here for safety.

In order to avoid too large An- / Abstellwege and still hedge Bahnwickler, can on the druckstellenfemen side of the bearing block 29, a travel limit by a mobile, force-limited stop 39 as overload protection 39 z. B. be provided in conjunction with a spring element, which in the operative pressure-off position, ie the piston 32 are relieved and / or retracted, although serve as a stop 39 for the bearing block 29, in the case of a web winder or other from the pressure point However, due to excessive forces, there is a longer way to go free. A spring force of this overload protection 39 is therefore chosen to be greater than the sum of the forces from the spring elements 37. When operational on / off is therefore only a very short travel, z. B. only 1 mm to 3 mm, providable.

The stop 33 is in the illustrated embodiment ( Fig. 4 ) as a transverse to the direction of the travel S movable wedge 33, wherein the same moves the position of the respective effective stop surface 34 along the travel S varies. The wedge 33 is supported for example on a carrier-fixed stop 41.

The executed here as a wedge 33 stop 33 is moved by an actuator 36, for example, by a pressure medium actuable actuating means 36, z. B. a piston operable with a pressure medium 36 in a working cylinder with (double-acting) piston via a z. This actuator 36 can either be effective in both directions or, as shown here, be designed as a one-way actuator, which operates against a return spring 43 when activated , The force of the return spring 43 is from o. G. Reasons (largely force-free stop 33) chosen so weak that the wedge 33 is held only against gravity or vibration forces in its correct position.

In principle, the stop 33 can also be designed in a different way (for example as a plunger which can be adjusted and fixed in the direction of adjustment) in such a way that it has a stop surface 34 which can be fixed in the direction of the travel S and, at least during the setting process forms for the movement of the bearing block 29 in the direction of pressure point. In one embodiment, not shown, a location of the stopper 33 is for example directly parallel to the direction of the travel S by a drive means, for example, a pressure medium actuated cylinder with (double-acting) piston or an electric motor.

The Fig. 5 and 6 each show a printing tower 44 each having a plurality, z. B. eight of the in the Fig. 1 and 2 arrangements shown, each cooperating printing cylinder 01; 02 each have in conjunction with an employee employed on the respective form cylinder 02 inking and dampening unit. In the Fig. 5 are in a first operating state of the printing tower 44 each two of the in the Fig. 1 and 2 illustrated arrangements of cooperating printing cylinder 01; 02 together with their respective associated inking and dampening in a so-called rubber-rubber arrangement against each other employed, the nip point between the hired transfer cylinders 01 forms a pressure point. The printing tower 44 has z. B. two pairs of spaced from each other, opposite standing side frames 47; 48 on, in the Fig. 5 and 6 each of these pairs only one of the respective pair forming frame walls is shown. In each pair of side frames 47; 48 of the in the Fig. 5 and 6 illustrated printing tower 44 are each more, z. B. four in the Fig. 1 and 2 illustrated arrangements of cooperating printing cylinder 01; 02 together with their respective associated inking and dampening vertically arranged one above the other, which by this arrangement, the execution z. B. a four-color printing is possible. The (not shown) printing material, preferably a material web, is preferably passed between the mutually employed transfer cylinders 01 from bottom to top through the printing tower 44 and can be printed on both sides at the same time. The in the Fig. 5 and 6 shown printing tower 44 may be part of a newspaper printing press. Preferably, all printing cylinder 01; 02 of this printing tower 44 in a in the Fig. 4 shown, linearly adjustable storage unit 24 stored. Likewise, at least all applicator rollers 03; 04; 06; 18 and preferably also the respective film roller 09, the respective ink flow separation roller 11 and the respective dampening drive roller 21 in connection with the Fig. 2 explained manner mounted radially displaceable.

The printing tower 44 is arranged on a foundation 46. It can be provided that at least one of the pairs of side frames 47; 48 is linearly movable on the foundation 46. Fig. 5 shows the first operating state of the printing tower 44, in which both pairs of side frames 47; 48 are employed against each other. In this first operating state of the printing tower 44, the printing press, the production of a printed product, for. As a newspaper run. To perform manual work on the printing units is at each to the longitudinal direction of the printing cylinder 01; 02 and rollers 03; 04; 06; 08; 09; 11; 12; 13; 18; 21; 22 parallel outer side of the printing tower 44 each preferably a height-adjustable pedestal 49 is provided.

The Fig. 6 shows the in the Fig. 5 illustrated printing tower 44 in a second operating state in which the pair of side frame 48 on the foundation 46 linearly from the example shown in this example as a stationary pair of side frame 47 moves away and thus, as well as a directional arrow with respect to the pair of side frame 48 indicates. With the separation of the two pairs of side frames 47; 48 from each other, the transfer cylinders 01 involved in the pressure points are parked from each other. In addition to the pedestals 49 on the longitudinal direction of the printing cylinder 01; 02 and rollers 03; 04; 06; 08; 09; 11; 12; 13; 18; 21; 22 parallel outer sides of the printing tower 44 can in a formed by the shutdown of a pair of side frames 48 gear 51 between the two mutually parked pairs of side frames 47; 48 a preferably height-adjustable pedestal 49 may be provided to allow the execution of manual work on the printing units.

The Fig. 7 also shows in the Fig. 5 illustrated printing tower 44 in its first operating state, in which in different pairs of side frames 47; 48 arranged and forming a common pressure point transfer cylinder 01 are employed against each other. In contrast to Fig. 5 is the one in the Fig. 7 illustrated However, printing tower 44 provided for performing a dampproof dry offset printing process, because the printing tower 44 of the Fig. 7 has no dampening units. For simplicity and clarity are in the Fig. 7 the in the Fig. 4 shown, linearly adjustable storage units 24, in each of which one of the printing cylinder 01; 02 of this printing tower 44 is stored, not shown. Also, for the same reasons has been waived in the Fig. 7 each radialhubfähigen bearings of the inking rollers 03; 04; 06 as well as preferably also the film roller 09 and the ink flow separating roller 11 of the respective inking units represent, because these bearings are each already in connection with the Fig. 2 been explained. Likewise, the pairs of side frames 47; 48 be designed to be mutually adjustable, as it is z. B. in conjunction with the Fig. 6 has been explained.

Fig. 8 shows again in connection with the Fig. 5 Illustrated printing tower 44, wherein now each form cylinder 02 is assigned in each case a printing forme magazine 58, which is shown in each case in a preferably tangentially employed to the respective forme cylinder 02 operating state. Each printing forme magazine 58 has at least one first shaft 59 for feeding at least one new printing forme to the forme cylinder 02 and preferably also a second shaft 61 for receiving at least one printing forme discharged from the forme cylinder 02. The two shafts 59; 61 define memory positions respectively for at least one printing form. These shafts 59; 61 are preferably each aligned substantially horizontally and arranged one above the other at a vertical distance. At the forme cylinder 02 facing the end of the first shaft 59 for supplying at least one new printing forme for form cylinder 02 z. B. at least one in a plane of the printing form to be supplied einschwenkbarer lateral stop 62 is provided, on which the forme cylinder 02 to be supplied to the printing for making a register-containing feed is guided laterally. To fix a printing plate on the lateral surface of the forme cylinder 02 is at a short distance from the forme cylinder 02 to this preferably by a remote control z. B. pneumatically engagable pressure element 63, z. B. a rolling element 63 is provided which temporarily fixes a printing forme to be supplied to the forme cylinder 02 in the assembly process. With the printing forme magazines 58 an automatic change of printing plates on the respective forme cylinders 02 is possible in its course, as a result of which a set-up time for conversion to a new production of a printed product is considerably shortened compared to a manual execution of the change of printing forms. This advantage is all the more important, the more printing forms are to be changed for a production change at the same time. However, a simultaneous change of many printing forms corresponds to common practice, especially in newspaper printing. If the eight arranged in the printing tower 44 form cylinder 02 are each occupied in a 6/2 occupancy with printing plates and all these printing plates for a production change are to change at the same time, so in the printing tower 44 a total of 96 printing plates must be replaced, resulting in an automated process can be done in less than two minutes.

LIST OF REFERENCE NUMBERS

01

Printing cylinder, transfer cylinder

02

Printing cylinder, form cylinder

03

Inking roller

04

Inking roller

05

-

06

Inking roller

07

Paint reservoir, ink fountain, paint tray

08

ink fountain roller

09

Roller, film roller

10

-

11

Roller, ink separation roller

12

Roller, rubbing roller

13

Roller, rubbing roller

14

Roller, squeegee roller

15

-

16

doctor

17

bridge roller

18

Roller, dampener

19

spray

20

-

21

Roller, dampening roller

22

Roller, smoothing roller

23

actuator

24

storage unit

25

-

26

Bearings, radial bearings, cylindrical roller bearings

27

Bearing means, bearing element

28

Bearing means, bearing element

29

Storage block, sled

30

-

31

carrier

32

Actuator, adjusting means, pistons, hydraulic pistons

33

Stop, wedge

34

stop surface

35

-

36

Actuator, adjusting means, piston

37

resilient element, spring element

38

Valve

39

Stop, overload protection

40

-

41

attack

42

Transmission link, piston rod

43

Return spring

44

printing tower

45

-

46

foundation

47

side frame

48

side frame

49

podium

50

-

51

Drive, electric motor

52

Drive, electric motor

53

Drive, electric motor

54

Drive, electric motor

55

-

56

Drive, electric motor

57

Drive, electric motor

58

Printing forme magazine

59

shaft

60

-

61

shaft

62

attack

63

Pressure element, rolling element

A

color power

B

main power

C

sidestream

D

partial flow

e

partial flow

F

partial flow

S

Travel Range

a06

distance

a13

distance

T02

tangent

T06

tangent

Claims (21)

1. Arrangement in a printing unit of a rotary printing press, at least having a forme cylinder (02), three inking rollers (03; 04; 06), two friction rollers (12; 13) and an ink separator roller (11), both friction rollers (12, 13) being thrown in each case directly onto the ink separator roller (11), one of the inking rollers (03) being thrown both onto one of the friction rollers (12) and onto the forme cylinder (02), the other two inking rollers (04; 06) being thrown both onto the other friction roller (13) and onto the forme cylinder (02), a printing ink being provided from an ink-duct roller (08) having an ink reservoir (07), characterized in that the forme cylinder (02) is occupied by a plurality of printing formes, in that only a single roller (09) is arranged between the ink-duct roller (08) and the ink separator roller (11), at least this roller (09) being arranged so as to be capable of a radial stroke, the radial stroke of this roller (09) being such that the respective axis of this roller (09) or at least one of the ends of this roller (09) is eccentrically displaceable relative to a bearing point which belongs to this roller (09) and is fixed to the frame.
2. Arrangement according to Claim 1, characterized in that the uppermost inking roller (06) is arranged in such a way that a horizontal tangent (T06) to the circumference of this inking roller (06) is a vertical distance (a06) of at least 50 mm away from a horizontal tangent (T02) to the circumference of the forme cylinder (02).
3. Arrangement according to Claim 2, characterized in that a printing forme magazine (58) is positioned tangentially to the forme cylinder (02), above the uppermost inking roller (06).
4. Arrangement according to Claim 3, characterized in that the printing forme magazine (58) has at least one substantially horizontally aligned shaft (59; 61).
5. Arrangement according to Claim 4, characterized in that the printing forme magazine (58) has at least one first shaft (59) for feeding at least one new printing forme to the forme cylinder (02).
6. Arrangement according to Claim 4, characterized in that the printing forme magazine (58) has a second shaft (61) for receiving at least one printing forme removed from the forme cylinder (02).
7. Arrangement according to Claims 5 and 6, characterized in that both shafts (59; 61) are aligned substantially horizontally and are arranged at a vertical distance one above the other.
8. Arrangement according to Claim 1, characterized in that the forme cylinder (02) is in the form of a double-circumference cylinder (02), the forme cylinder (02) having two section lengths along its circumference, each section length corresponding to a height of a newspaper page to be printed.
9. Arrangement according to Claim 1, characterized in that the ink separator roller (11) divides an ink stream (A) arriving from the ink-duct roller (08) into a mainstream (B) and into a secondary stream (C).
10. Arrangement according to Claim 1, characterized in that this roller (09) arranged as a single roller between the ink-duct roller (08) and the ink separator roller (11) is in the form of a film roller (09).
11. Arrangement according to Claim 10, characterized in that the film roller (09) has a lateral surface with a stochastic structure.
12. Arrangement according to Claim 1, characterized in that the respective axis of rotation of all rollers (03; 04; 06; 08; 09; 11; 12; 13) transporting printing ink to the forme cylinder (02) is arranged in each case a vertical distance away below the horizontal tangent (T06) to the circumference of the uppermost inking roller (06).
13. Arrangement according to Claim 1, characterized in that a dampening unit is coordinated with the forme cylinder (02).
14. Arrangement according to Claim 1, characterized in that the ink separator roller (11) and/or the inking rollers (03; 04; 06) and/or at least the dampening roller (18) of the dampening unit, which dampening roller can be thrown onto the forme cylinder (02), are arranged in each case so as to be capable of a radial stroke, the radial stroke of these rollers (03; 04; 06; 11; 18) being such that the respective axis of these rollers (03; 04; 06; 11; 18) or at least one of the ends of these rollers (03; 04; 06; 11; 18) is eccentrically displaceable relative to a bearing point belonging to the respective roller (03; 04; 06; 11; 18) and fixed to the frame.
15. Arrangement according to Claim 1, characterized in that one of the two friction rollers (12; 13) is driven by a drive (53; 54) which is independent in each case of a drive (51; 52) of the forme cylinder (02) or of a transfer cylinder (01) cooperating with this forme cylinder (02).
16. Arrangement according to Claim 1, characterized in that a doctor blade roller (14) is thrown onto the ink separating roller (11), a doctor blade (16) being thrown onto the doctor blade roller (14).
17. Arrangement according to Claim 16, characterized in that the doctor blade roller (14) thrown onto the ink separating roller (11) is arranged, in the direction of rotation of the ink separating roller (11), after the branching-off of the secondary stream (C).
18. Arrangement according to Claim 1, characterized in that both ends of the forme cylinder (02) or of a transfer cylinder (01) cooperating with this forme cylinder (02) are mounted in each case in a bearing unit (24), the bearing unit (24) permitting the respective cylinder (01; 02) to execute a linear adjustment travel (S), this adjustment travel (S) being oriented substantially orthogonally to a print medium printed by the transfer cylinder (01).
19. Arrangement according to Claim 1, characterized in that the ink knives which meter in a zone-by-zone manner printing ink received from the ink reservoir (07) are provided on the ink duct roller (08).
20. Arrangement according to Claim 1, characterized in that the two friction rollers (12; 13) execute a traversing stroke in their respective axial direction, the traversing stroke of the two friction rollers (12; 13) being opposite in direction.
21. Arrangement according to Claim 1, characterized in that it is arranged in a printing tower (44), a plurality of these arrangements being arranged vertically one on top of the other in this printing tower (44).

Images